Bag feeding apparatus



Feb. 3, 1948. R. P. EAGLES BAG FEEDING APPARATUS 3 Sheets-Sheet 1 Filed NOV. 4, 1946 INVENTOR. ROBERT I? EAGLES Feb- 3, 1948. R. P. EAGLES BAG FEEDING APPARATUS Filed Nov. 4, 1.946

v 3 Sheets-Sheet 2 8 RM f mm WE mR M m E 0 R M B F N QN Q L k J Q m N\ k DMN Feb. 3, 1948. R. P. EAGLES BAG FEEDING APPARATUS Filed Nov. 4, 1946 3 Sheets-Sheet 3 IN VEN 7 0R. ROBER r R EA 6/. 55

B W 3 M l, 1/. A i

.R gig.

Patented 3,

2,435,532 BAG FEEDING APPARATUS Robert P. Eagles,

mond, Va., a corporat Richmond, Va., assignor tov Virginia-Carolina Ch emical Corporation, Richion of Virginia Application November 4, 1946, Serial No. 707,591 -8 Claims. (01. 223-39) In spite of the fact that automatic bag feeding mechanism for bag turning machines is described in the prior art it has been my experience that it is not commonly used and that the bags usually are fed to the turning machines by hand. This is very tiring work and is a frequent cause of cocupational disability.

An object of my invention is to provide a simple and practical automatic bag feeding mechanism which readily may be incorporated into existin bag turning machines.

In reducing my invention to practice, I have incorporated my bag feeding mechanism into a so-called Ersted bag turning machine, making only such alterations therein as were necessary to effect the combination. It will be understood from the following disclosure of the invention that my bag feeding mechanism may be incorporated into or combined with any bag turning machine of the type in which the mouth of the bag is placed over and held by holding fingers while it is being turned.

In the accompanying drawings I have illustrated my bag feeding mechanism in combination with the so-called Ersted bag turning machine.

Referring to the drawings:

Fig. 1 is a side elevation of the machine, the bag feeding mechanism being in position to pick up a bag,

Fig. 2 is a perspective view of the cam shaft which operates the movable parts of the bag feed mechanism with the driven'sprocket wheel which turns the shaft omitted,

Fig. 3 is an enlarged detail side elevation of a portion only of the machine showing the bag feeding mechanism in the position at which the mouth of the bag has been drawn over the holding fingers,

' Fig. 4 is an enlarged side elevation of a portion of -the machine showing the bag feeding mechanism in the position at which it has released the bag and is ready to move forward to pick up another bag,

' Fig. 5 is a plan view of a portion of the machine; the showing being confined to the parts shown in elevation in Figs. 3 and 4,

Fig.6 is an enlarged sectional view of the Pick up head of the bag feeding mechanism,

Fig. 7 is a section taken on the line 1-1 of Fig. 5, certain parts being shown in elevation,

Fig. 8 is a view, partly in elevation and partly in section, of one of the pick up member as viewed on the section line 8-8 of Fig. '7 and .--'Fig. 9 is a section taken on the line 99 of F g-8.

The bag turning machine to which my bag feeding mechanism has been applied consists essentially of the frame I the pressure rolls 2, which receive the turned bag and deliver it to the piling device 3, the receiving fingers 4, which open and hold the mouth of the bag while it is being turned, the pressure bar 5, which cooperates with the lower fingers to holdthe bag firmly while it is being turned, the platform 6, the turning sticks I, and operating mechanism for driving the rolls 2, and moving the fingers 4, and the sticks I, including the main drive shaft 8. The showing of the means for operating the fingers 4 has been omitted so that thebag feeding mechanism can be more clearly seen. 7 The shaft 8 drives the cam shaft 9 through the sprocket wheel l0, chain [I and another sprocket wheel l2 on the shaft 9.

The shaft Q carries the three cam 13, I4 and I5. Cam l4 rotates in contact with the roller IS on the end of arm I! to turn the shaft l8 and oscillate the arms l9. Cam l3 rotates in contact with the roller 20 on the lever 2l which oscillates the link 22 and arm23 secured to the shaft 24 and thus oscillates the pick up members 25. The cam 15 rotates in contact with the roller 26 carried on the arm 21, movement of which operates the valve 28 which controls the suction transmitted through the flexible hose 29 to the pick up members 25.

By means of the mechanism described above it will be seen'that the pick up members 25 are moved first forwardly and downwardly into contact with the uppermost of a pile of bags on the support 6 and then rearwardly and upwardly to lift and move the open end of the bag over the ends of the fingers 4. It is noted that in the position shown in Fig. 1 the fingers 4 are closed and their ends elevated to receive the bag. In the position shown in Fig. 4 the fingers 4 have been spread apart to open the mouth of the bag and also moved downwardly so as to position the ba in the path of the turning sticks I.

The pick up members 25 are carried by the shaft 24. This shaft is square in cross section excepting at the end cylindrical bearing surfaces 30 which fit within the 'j ournaled ends of the arms IS. The arm 23 is secured to one end of the shaft 24 by the key 3|. The shaft 24 is tubular and contains the shaft 32 turnably secured therein by the set screw 33 fitting into the groove 34. The shaft 32 has oppositelyscrew threaded portions 35 and 38 and the projecting square end 31 for turning it. The tubular shaft 24 is'provided along one side thereof with a longitudinal slot 38 which extends over the threaded portions 35 and 33 of the tion it has not been illustrated.

Each pick up member 25-; comprises the hub,

portion above referred to, a tubular portion ME projecting therefrom, a shaft portion -44-an'd the 7 pick up head comprising toothed; whirls -4 and 49. One end of the shaft pert-tea 44' within the tubular portion 43 against the spring 45"ai1dI is secured by the bolt 46 which extends through the elongated opening 41-. The other end of the shaft portion 4'4 provides ,a partial housingjjand support for the toothed wheels 48 and 49. The axle .50 of wheel 49 is connected :to, the arm "51 which is in turn connected to the :piston rod .52. Piston '3 isreciprQc'ated in the cylinder 54;by successively decreasing eanddncre'asing the air pressure in the oylinder '54 through the :hose '29. The teeth of wheel 48 engage theteth of wheel 49 so that when wheel 49 is turned in one direction wheel 48 is turned-in the opposite direction.

The-operation of the a paratus is as follows: workman places aSfaCk of bags 55 on the platform 6 and starts the machine. The oams l3,

(4 an i5 ""r' so positioned on the shaft 9 that the pick up mem ers -2' 5 *wm fir'st be moved 'to the positionshown in Fig, '1 with thetoothed wheels 48 and"!!! fin'fcontact with-the top-most ba e pain then oper tes the valve 28 to applysuction through the hose '29 to the cylinder 54whi'oh'i'ai'se's the p 011753 and c'onnec'tirigrod '52 "r tates the-a 51-, he -s'ha'ftf'50 an the wheel 48 and!!! phioh u'p the top-layer of s li 'a' q eil eh-F5 as aie pivl ta an e a bars 25 iiiei rd hdi en he fen 'tg m fl cea rw dl t e this point, the cam 1'5 heed. rm t enem e to .re ee eihe 8 P1 an 531?? tii n uji h .e

bag. them antimethe fingers ved downwardly "and ftli have opened 7 H reversing rods the bases shown in Fig, 14.

lih v moiid o he ba is t ir a h 1 9 e charged and the operations edv t. 7 As will be. I erated y superatnio'sphericpressure rather than by suction and in both directions to pick release a tee may be provided without departi-ng from iny inew i ee-fl l V e V V It,is noted that thesprings 45 in thepick up members permit the latter to contact the bags with the proper amount of pressure for the best operation of the toothed wheels 148 and 49 in picking up only the top layer of cloth over a considerable range of thickness of the pile of bags on the platform, 6. It --is understood that the size and "shape of the teeth on the wheels 48 and 49, the tension of t e-s'prings 45 and even the exte'ntf'o'f "movementvof the piston 53 may be varied forpickingu'p difiierentkinds Lof rbagfma described are re- 59. rolls 2 and dis"- means fo m it pos ti'y'eiy 10 fingers 4 are similarly adjustable but since this feature constitutes no part of the presentinven est-tee tie-teat e may be or 4 attending bags-tape t eegtiel i lrfim; the bags terial, i. e. smooth or rough or thick or thin or stiif or flexible cloth. It is understood also that is possible by manual operation and moreover htakes possible a more rapid and continuous op- "iatiofi of the bag turning machine. A workman lth macliin has only to supply it with f n'd 'and to start and stop it and is i'elivw of th tbiision involved in rapidly and V to the turning mechanism by hand. I

1. Apparatus for picking up and transporting a :"smgledayeribf .fabridfro'm-thetop' ofaa' pileiof layers 0f fabric comprisihg an "upwardly iextend in'g arm pivoted at -.a point 'zremote from its 11111581 and; a downwardly extending arm theupper e'nd of which 7 is Ipivotaliy supported. adjacent the upper end-of thesfirst named arm,1a -pick up head at the lower end of said s'e'cbiid fi'ained means for periodically winging said first named a'rm aboutit's'pivot point to moi/ e tnjedipper n'd thereof back .ena rer tn tnreuen en re for periodically swinging said e 6 back and forth-fabout'it i i kiip retu n 3 fi e. 7, v V

h .m a- 1a V 'rotatable shaft and in whih the'nieans 'rer fswing'ingfsfai-d ""i s second seemed tofsa dshart and aging'said 'secondfarhi. 1 a A '3. Apparatus as "defined 61211111 1 in said downwardly extending arrnis secured at mm a team ene meets fe t w en: "are co "prises a second aimeeureeto the 'rotat le shaft supporte by the u per eta tree-1a upwards-esteem a lever pivoted at a fixed point. a link cp'nne in? apointldn saigi *le 1 and aiiiioi t'onv'sf id scdhd tsetse resteet e s i n e u g n 7 a haft. o t o .e

ilmi mncns 01m: The toil owing reierenes are of redrfi in tfio iiie of this patent:

UNITED STATES PATENTS Name bate Buttizieg July 22, 1941 Number 

